考虑临近空间零控交班的指令修正中制导研究

针对临近空间高超声速目标防御问题，根据目标特性提出了空基巡航段防御方案。在此基础上考虑临近空间防御特点进行中末制导交班问题分析，提出交班点性能指标，并得出连接中末制导阶段的有效零控拦截交班区域（零控交班）。结合模型预测静态规划理论与防御飞行器中制导终端状态约束条件，推导了最优控制问题的解析算法并将其作为防御飞行器的指令修正制导律，针对不同任务情况进行了数值仿真。仿真结果表明，零控交班区域分析结果可满足终端小速度比交会条件。设计的中制导律在显著提高计算效率的同时满足零控交班约束,且经过Monte Carlo仿真表明对初值扰动具有较强的鲁棒性。

Research on Command Correction Midcourse Guidance Law with Zero Effort Handover in Near Space

A space-based cruise phase defense strategy is proposed for near-space hypersonic vehicles.Considering the properties of near-space defense,a valid zero effort interception handover (ZEH) region and its performance criterions are presented by analyzing the handover region,which connects the midcourse and terminal guidance phases.Based on the model predictive static programming (MPSP) theory and the terminal constraints of midcourse phase,a close-formed solution is derived as the command correction guidance law.The proposed guidance law is used for simulation.The simulated results show that a small velocity-ratio condition for terminal engagement is satisfied by ZEH.The proposed method can improve the computational efficiency significantly,and also meet the requirement of ZEH constraint.A large number of Monte Carlo simulations show the robustness of the guidance law against initial disturbances.